Ovni 37 Information, Review, Specs

Make
Ovni
Model
37
Builder
Alubat
Designer
Philippe Briand
Number Built
Production Year(s)
1985 - 1989

The Ovni 37, designed by the prolific Philippe Briand and launched by Alubat in the mid-1980s, serves as a cornerstone of the French "dériveur intégral" (full lifting keel) tradition. Built entirely from AG4MC aluminum, this vessel was engineered for sailors whose ambitions extend beyond coastal hopping to the high latitudes and remote tropical archipelagos. Unlike contemporary mass-production yachts that utilize fiberglass molds, the Ovni 37 is a product of heavy-duty metalwork, featuring a distinctive hard-chine hull that provides both structural rigidity and impressive initial stability. The model was a pivotal evolution for Alubat, bridging the gap between the earlier Ovni 35 and the later, highly successful Ovni 385. It remains a sought-after platform on the secondary market for expedition sailors who require a boat capable of "taking the ground" or drying out completely on a tide—a feat made possible by its heavy internal ballast and a keel that retracts fully into the hull.

Sailing Performance & Handling

The sailing characteristics of the Ovni 37 are defined by its lifting keel configuration and its robust displacement-to-length ratio. With the keel fully deployed to a depth of approximately 2.10 meters (6.9 feet), the boat demonstrates surprising tracking and pointing ability, though it lacks the "bite" of a deep-finned performance cruiser in light air. Its design philosophy, as outlined by Philippe Briand, prioritizes sea-kindliness and safety in heavy weather.

Because the ballast is located internally along the bottom of the hull rather than in the keel itself, the Ovni 37 has a softer motion in a seaway compared to modern, high-stability-index boats with T-bulbs. This makes for a less fatiguing experience during long offshore passages. However, the trade-off is a lower Sail Area to Displacement (SA/Disp) ratio; the Ovni 37 is a "momentum boat" that requires a stiff breeze to truly wake up. Owners frequently report that the boat feels most at home in Force 4 and above, where its weight and chined hull allow it to lock into a groove. One unique handling advantage is the ability to partially raise the keel when sailing downwind, which reduces drag and prevents the boat from "tripping" over its keel in large following seas.

Interior Comfort & Variations

Inside, the Ovni 37 reflects Alubat’s commitment to functional, blue-water living. The most common configuration features a two-cabin layout with a large aft cabin and a forward V-berth, though a three-cabin version was produced to accommodate larger crews. The interior is characterized by the prominent centerboard trunk in the middle of the saloon, which Alubat’s designers cleverly integrated into the dinette table.

Materials typically include light oak or ash joinery, which helps brighten an interior that can feel somewhat enclosed due to the robust, smaller-profile aluminum portlights required for offshore integrity. Headroom is generous for a 37-foot boat, generally exceeding 1.90 meters (6'3") in the main saloon. A key sibling to note is the Ovni 36, which followed shortly after with a slightly more modernized deck layout, and the Ovni 35, which the 37 replaced by offering improved volume in the aft quarters and a more refined hull shape. For those seeking even more space, the Ovni 385 evolved from this hull's DNA, extending the waterline and refining the rudder configuration.

While the Ovni 37 itself has been a quiet workhorse of the cruising world, it benefits from the massive cultural footprint of the Ovni brand. High-latitude pioneer Jimmy Cornell famously chose the Ovni range (specifically the 43) for his "Aventura" expeditions, cementing the brand’s status as the definitive choice for world exploration. The Ovni 37 specifically has been featured in numerous French sailing periodicals as the "reference point" for mid-sized aluminum cruisers, often cited as the boat that brought blue-water aluminum construction to the "everyman" sailor.

Known Issues & Buyer’s Checklist

The most critical area for any prospective Ovni 37 buyer is the integrity of the aluminum hull and the prevention of galvanic corrosion.

  • Electrolysis & Zincs: Buyers must verify that the boat has been fitted with appropriate sacrificial anodes and that the electrical system is fully isolated. Inspect the hull internally, especially under the floorboards in the bilge, for "pitting" or white powdery deposits.
  • Keel Lifting Mechanism: The hydraulic or manual lift system for the centerboard (keel) and the rudder requires meticulous inspection. The pivot pin and the lifting cable/ram are high-wear items; if the keel "clunks" when the boat rolls, the bushings likely need replacement.
  • Insulation: While Alubat uses high-quality insulation, older models may have gaps that lead to condensation behind the cabinetry, particularly in cold climates. Checking for water stains behind lockers is essential.
  • Teak Decks: Some Ovni 37s were fitted with optional teak side decks. If these were screwed rather than glued, they represent a significant risk for moisture entrapment against the aluminum, which can lead to localized corrosion if the bedding has failed.

Community & Resources

Owners of the Ovni 37 are supported by a dedicated international community. The Ovni Club (specifically the French and UK branches) serves as the primary technical repository for this model. These associations provide specific guidance on maintaining Alubat's unique lifting keel systems and offer a network of sailors who share modifications for long-distance voyaging. Technical support and original parts can still be sourced through Alubat in Les Sables d'Olonne, as the shipyard maintains an active heritage department.

The Verdict

The Ovni 37 is a "purpose-built" machine that trades raw speed and sleek aesthetics for unmatched versatility and peace of mind.

Pros:

  • Shallow Draft: Can access anchorages and rivers off-limits to most 37-footers.
  • Durability: Aluminum hull is virtually puncture-proof compared to GRP.
  • Beaching Ability: Can sit flat on its hull for hull cleaning or to wait out a tide.
  • Blue-Water Pedigree: Built by a yard with an unrivaled reputation for metal yachts.

Cons:

  • Maintenance Intensity: Requires vigilant monitoring of the electrical system and anodes.
  • Weight: Heavier and slower in light winds than performance-oriented fiberglass siblings.
  • Price Premium: Aluminum construction commands a higher resale value than GRP equivalents.

Measurements

Construction & Hull

Construction Material
Aluminum
Hull Type
Monohull Sailboat
Keel Type
Centerboard
Rudder
1x —
Ballast
5071 lbs (Iron)
Displacement
12346 lbs
Water Capacity
53 gal
Fuel Capacity
28 gal

Dimensions

Length Overall (LOA)
39.04 ft
Waterline Length (LWL)
29.53 ft
Beam
11.81 ft
Draft
6.72 ft
Max Headroom
6.23 ft
Air Draft
49.54 ft
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Cutter
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
610.31 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
18.28
Ballast / Displacement Ratio
41.07
Displacement / Length Ratio (D/L) Ratio
214.04
Comfort Ratio
21.99
Capsize Screening Formula
2.04
Hull Speed
7.28 kn